NFS Performance (was Re: [Beowulf] GPFS on Linux (x86))

Chris Samuel csamuel at
Wed Nov 8 18:51:45 PST 2006

On Tuesday 19 September 2006 19:55, Krugger wrote:

> Could it be that you are getting timeouts because you don't have
> enough nfsd daemons. This only might happen under heavy I/O load. And
> when there are thousands of operations floading the server sometimes
> it just has to drop some off the queue when the queue get full.

I had the number of NFS daemons up to around 128 at one point.  That only 
succeeded in getting us a load average of 90+ with them all sitting around in 
device waits.

FC3 with XFS worked just fine with the standard number of daemons.

Chris (catching up on old email)
 Christopher Samuel - (03)9925 4751 - VPAC Deputy Systems Manager
 Victorian Partnership for Advanced Computing
 Bldg 91, 110 Victoria Street, Carlton South, VIC 3053, Australia

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